Valve



Oct. 4, 1932. H. E. EVANSi ET AL VALVE Filed July s, 1931 Patented oet.4,` 1932 VUNITED s'ra'rasl PATENT oFFleE HARRISON E. EVANS,A OF BELMONT,MASSACHUSETTS, AND CHAUNCEY D. ALLEN, Ol'

PHILADELPHIA, PENNSYLVANIA, v.ASSIGNORS T0 CONSOLIDATED ASHCROFT HAN-COCK COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF DELAWARE.

VALVE Application led July` 30, 1931. Serial No. 553,928.

.This inventio-n pertains to valves of the type employed particularlyfor controlling high pressure fluids, for example, steam, and whichcomprise a stationary valve seat and a valve head wh'ich is moved towardand from the seat by means of a stem member commonly arranged to rotateas well as to move axially. Such a valve, having a substantially conicalvalve head or plug, attached to the valve stem by a swivel connection sothat itneed not partake of the rotary movement of the stem, is disclosedin the vpatent to Williston, No. 1,499,433, dated July 1, 1924. Invalves of this type, it is necessary to employ packing material toprevent leakage of fluid longitudinally of the valve stem, such packingusually being disposed in an annular pocket concentric withthe stem andbeing held under compression therein by means of an adjustable gland.The patent to Belvin T. W'illiston, No. 1,573,108, dated February 16,1926, discloses a. valve -of this general type including means by whichthe gland may be controlled positively, both for advancing and re.-tracting it,and the present invention constitutes an improvement uponthe construction disclosed in said patent. v

Valves of this character are often used in places which are dillicult ofaccess, andthevalves themselves are frequently very hot or in proximityto other heated parts, and since the gland must be adjusted from time totime or removed forlreplacement of the packing, and since the packingmaterial is sometimes of a character which may be injure-d by hea-t, itis desirable not only that the gland adjusting means be easilyaccessible for the application of adjusting tools and that the gland beretractable to permitreplacement of the packing by the same meansemployed for advancing it to apply pressure, but also that the gland beexposed as much as possible to the open air so as to radiate heat andprevent overheating of the packing. 4

In the device of the aforesaid Williston pate-nt, some of thesedesirable'characteristics are obtained -in part at least, but at theexpense of serious complication of parts, and the primary object of thepresent inventionl is to provide a valve in which the desirable resultsabove noted are attained to a high degree by the use of few, simple, andinexpensiveparts which permit .very ready assemblage of the valvemembers, and' great easefof adjustment, as Well as the rapid radiationof heat from the gland.

Another object of the inventionl is to provide a valve of the plug gatetype which includes a one-piece bonnet and bonnet nut and a removablestem receiving sleeve.

In the accom anying drawing in which certain speciiic em odiments of theinvention are illustrated by wayl of example:

Fig. lis a central vertical section showing the assembled valve with thevalve head engaging its seat, and with the packing and gland in place;

Fig. 2 is a transverse section on the line 2-2 of Fig. 1;

Fig. 3 is a the gland adjusting nut, illustrating one step in theprocess of assembling the gland with the nut;

Fig. 4 is a composite plan and side elevation of a nut of a modifiedtype, showing the gland assembled therewith;

. Fig. 5v is a diametric section through the nut of Fig. 4, showing themethod of assembling the gland therewith; and l Fig. 6 is a compositeView showing a further modilied form of nut, in plan Aand sideelevation, diagrammatically illustrating the mode of assembling thegland with the nut.

Referring to Fig. 1, the numeral 1 designates the valve body or casingwhich is provided .with usual inlet and outlet openlngs f and w1th thevalve seats 2, 2 with which cooperate the. conical plug gate valve head3.

This valvey head is swiveled to the stem.4 which, as here shown, isscrew threaded at its upper part for engagement with a screwthreadedsleeve fixed in the upper end 5 of the valve bonnet, it beingunderstoody that any other desired and usual arrangement may be employedfor imparting longitudinal movenient to the valve stem. The lower end 6of the bonnet which fits into or against the upper part vofthe valvebody 1 includes an internally screw-threaded integral ring 7 whichsurrounds and engages the body 1. It is to diametrie vertical sectionthrough bey understood thatthe valve bonnet may be lap the flange 17.The stem 4 is now passed integral with the main body 1 of the valve, ifdesired.

The lower end 6 of the bonnet is provided 5 with a recess or pocketconcentric with the valve stem and adapted to receive packing material 9of any desired and usual character. This packing material is compressedwithin the pocket by meansof a gland 10 having 10 atubular cylindrical,part which telescopes over the valve stem, and having at its upper endoppositely extending ears 11 and 12.

The valve bonnet comprises op-positely disposed connecting arms or posts13 and 14 15 uniting the upper and lower ends A5 and 6 of 29 ferentialrecess or groove 16 whose lowery the bonnet, these connecting membersbeing screw threaded on their outer surfaces for the reception of thegland adjusting nut 15. This nut is provided with an internal circumwallis defined by an annular flange 17 having a central opening 18, it beingnoted that this opening is preferably of such diameter that the inneredge of the flange does not engage the threaded portions of the parts 13and 14.l The recess or groove 16 receives the ends of the ears 11 and 12when the parts are in assembled relation, the length of the ears beingsuch that the distance between their outer edges 19 and 20 is somewhatless than the maximum diameter of the groove 16, but is substantiallygreaterthan the diameter of the opening 18 in ange 17. The upper end 5of the bonnet is annular and receives'the Sleeve 21 which, as previouslypointed out?,

has a screw-threaded engagement with the stem 4. The sleeve may besecured in the end 5 in any suitable manner, being here shown asthreaded thereinto andiixed by a set screw 22. The ylower valve seat 2is formed bythe walls of a conical cavity having a cylindrical extensionbelow the seat to form a clean-out passage 23 normally closed by aremovable plug 24, such clean-out passage lbeing highly desirablein avalve of thls type wherein the valve head has little if any rotarymovement and thus tends to pack sediment solidly in the lower seatcavity.

One novel feature of this invention resides in the assembly of the glandwith the other that the nut 15 is in engagement with the upper parts ofmembers 13 and 14. The gland 10 may now be inserted through4 one of vthespaces between the arms 13 and 14'and may be arran ed as shown in Fig.3, with one of its ears, or example the ear 12, seated in the bottom ofthe groove 16, and with the gland inclined. By proper angular movementof the gland, the ear 11 may now be moved up through the opening 18 inflange 17 to a point above the an and then by lateral movevment of thegland, the ear 11 is caused to overup throughthe gland 10 and 'itsscrewthreaded portion is engaged with the sleeve 21 in the upper'fe'nd 5of the bonnet. When thus arranged, the stem lprevents lateral movementof the gland with respect to the nut 15, so that the gland can not bemoved later-` ally, and thereby disassembled from the nut. The bonnet isnow assembled with the valve body, and after the packing has been placedHarige 17, by engagement with the ears 11 and 12, positively lifts thegland and withdraws it from'the packing recess. Thus the mereapplication of a wrench to the nut 15 sufiices to Withdraw the gland andexpose the packing for inspection, removal, or adjustment. It will benoted by reference to Fig. 2, that the members 13 and 14 occupy but asmall part of the circumferential dimension of the bonnet, thus leavinlarge open spaces for the circulation of air a out the upper end of thegland so that the latter is free to radiate heatv and the packing is notundul heated.l

In Figs. 4 and 5, a modi ed arrangement 1is shown in which the nut 15 isprovided with the internal groove 16 corresponding i with the groove 16above described, but in this case the groove is of substantially thesame diameter or but slightly greater than the distance between the endsof the ears 11 and 12 of the gland. In order to permit assembly of theparts, a lateral recess or opening 19 is arranged to extend radially outfrom the groove 16a at one side, and 1n assembling the arts one of theears of the gland is pushe into or through this recess or opening topermit the other ear to be swung up above the `iange 17 and into thegroove. 'When the stem is assembled with these parts, the gland is heldcentered in operative position.

In Fig. 6, another arrangement is shown inv which the nut 15h isfurnished with an in- I ternal groove 16" which in this case is ofsubstantial depth in an axial direction. The gland 1()b is furnishedwith the ears 11h and 12", and in assembling the parts the gland isdisposed angularly for insertion up into the nut'and tipped far enoughso that the ears 11 and 12b may be received within the depth of thegroove 16", whereupon the gland is turned until the ears lie in a planeperpendicular to the axis of the nut. In this case the oove 16" need notbe of a diameter substantmlly greater than the distance between the endsofthe two ears. While this arrangement may be used, that shown in Fig. 1is preferred, since it provides a' greater thickness of nut for thereception of the screw threads than is possible with the arrangement ofFig. 6. v

While the flange 17 or 17 '1 is shown as integral with the nut, it is tobe understood that it maybe formed as an independent part and 'fixedlysecured to the nut in any desired manner, and when the nut is describedas of'integral or one-piece construction, this expression is to beunderstood as inclusive of any arrangement in which its' various partsare permanentl united together. y

In consi ering the mode of assembly of vthe gland with the nut, it Willbe noted that in each case above described, the movement of the glandrelative to the nut comprises both an angular and a lateral component ofmotion, and that by the construction described it is possible thus toassemble a onepiece nut with a gland so that the gland is constrained topartake of the axiall movement of the nut in either direction, and Whilein association with the valve stem cannot be separated from the nut. IIt is further to be understood that changes in size, proportion ofparts, and details of construction, as well as the substitution ot'equivalents, fall Within the scope of the invention.

We claim:

1. A valve having an actuating stem and means for packing the stemincluding a gland, a one-piece nut for advancing and retracting thegland, the nut and gland-beingcapable of assembly and separation byrela- *5 tive movement comprising a lateral component, the stem whenassembled With the gland preventing such lateral component of movement.

2. A valve having an actuating stem and means for packing the stemincluding a gland, a one-piece nut for advancing and retracting thegland, the nut and gland having interengaging elements for transmittingmovement of the nut to the gland, the nut and gland being so constructedand arranged as to permit their assembly or separation by relativemovement comprising a lateral component, the stem when assembledWith-the gland preventing such lateral component of movement.

3. A valve having an actuating stem and means for packing the stemincluding agland, a nut for advancing and retracting the gland, the nuthaving an internal groove and the gland having projecting lugs, thegroove and lugs being of such relative dimensions as to permit assemblyor separation of the nut and gland by relative movement Lcomprising alateral component, the stem When assembled with the gland preventingsuch lateral component of movement.

4. A valve of the kind having a body provided with a valve seat, a valvehead cooperable with the seat, a stem for moving the head, a bonnetsurrounding the stem, the

bonnet having a packingJ recess concentric with the stem, said valvecomprising a gland telescoping over the stem, said gland havinglaterally extending diametrically opposed actuating ears, and aone-piece adjusting nut having screw-threaded engagement with the bonnetand having an internal circumfercntial groove in'which the ears of thegland are seated, the internal diameter of said groove beingsubstantially greater than the maximum distance between the outer edgesof the ears of the gland and the depth of the groove being such as topermit assembly or separation of the nut and gland by relative movementcomprising a lateral component,

the stem when assembled With-the gland pre-- venting such lateralcomponent of movement.

5. A valve of the kind having a body provided with a valve seat, a valvehead cooperable with the seat, a stem for moving the head, a bonnetsurrounding the stem, the bonnet having a packing recess concentric withthe stem, said valve comprising an adjusting nut having screw-threadedengagement with the bonnet, said nut having an internal circumferentialvgroove, a gland coaxial With the stem, said gland having oppositelyextending actuating ears normally seated in the groove in the nut, thelength of -the ears and the depth and diameter of the groove being suchas to permit assembly or separation of the vnut and gland by relativemovement comprising a lateral component, the stem when assembled withthe gland preventing such lateral component of movement.

6. A valve of the kind havinga body provided With a valve seat, a valvehead coo between the remote edges of the ears being such 'as to permitassemblage of the gland and nut by first inserting one ear -in thegroove and recess and then by successive angular and lateral movementsof the gland causing theother ear to enter the groove, the subsequentassembly of the stem with the gland holding the'partsin concentricrela-.

tion. and preventing separation ofthe'gland andnut. y

7. A valve of the kind having a body provided With a valve seat, a valvehead cooperable with the seat, a stem for moving the head, ya bonnetsurrounding the stem, the bonnet having a packing recess concentric withthe stem, sald valve having a bonnet comprising spaced parallelconnecting arms having screw-threadedvouter surfaces, a onepiece nutengaging said threaded surfaces,

said nut having an internal circumferential groove, and a packing gland.having integral ears (projecting into sai groovewhereby the glan isconstrained to partake of axial move'- ment of the nut, the arms of thebonnet being so spaced as to permit free circulation-of air for contactwith the exposed end of the gland and the length of the ears and thedepth o the groove being such as to permit assembly or separation vofthe nut and gland by relative movement comprising a lateral component,the stem when assembled with the Agland preventing such lateralcomponent of movement.

8. A valve of the kind having a body provided with a valve seat, a valvehead cooperable with the seat, a stem for moving the head, a bonnetsurrounding the stem, the bonnet having a packing recess concentric withthe stem, said valve comprising a onepiece adjusting nut havingscrew-threaded "engagement with the bonnet, said nut having an interalcircumferential groove, a glan normally coaxial with and fitting snuglyabout the stem, said gland having lateral ears normally seated in. thegroove in the nut, the nut having a radial ange constituting one wall ofthe groove, the diameter of the opening in the flange being less thanthe distance head, a bonnet surrounding the stem, the bonnet having apacking recess'concentric with the stem, said valve comprising anadjusting nut having an internal circumferential groove and a radialrecess leading therefrom, thev end wall 4of the groove consisting of anannular lia-nge fast tothe nut, a packing gland having diametricallyextending ears, the distance between the remote edges of the ears beingreater than the opening in said ange and ut slightly less than thediameter of the circumferential wall of the groove, the axial depth ofthe groove being such that in assembling the parts the gland may berocked angularly until its ears may be inserted within the groove,whereupon upon subsequent angular movement of the gland the ears may bebrought linto a plane perpendicular to the axis of the nut, 'thesubsequent assembly of the stem with the gland preventing such relativemovement of the nut and' gland aste permit separation of the latterparts.

Signed by us at Boston, Massachusetts this twenty-sixth day of June,1931.

HARRISON E. EVANS. CHAUNCEY D. ALLEN.

between the -outer edges of the ears of the gland, the depth of thegroove being substantially greater than the thickness of the ears andthe maximum diameter of the oove y ybeing greater than said distance, wereby when the gland is concentric with the nut it is united tothelatter, but when eccentric to the nut its ears may be disengagedsuccessively from behind the radial an e;

9. A valve-of the kind having a bo y provided with a valve seat, a valvehead cooperable with the seat, a stem for moving the head, a'bonnetsurrounding the stem, the bonnet having a packing recess concentric withthev stem, said valve comprising an adjusting nut having an internalcircumferential groove, the end wall of which consists of an annularflange fast to thev nut, a packinggland having diametrically extendingears, the distance between the remote edges of the ears .troducedintothe groove, the subsequent assembly of the stem with the glandpreventing relative radial movement of the nut and gland such as wouldpermit their separation. v

10. A valve of the kind havinga body provided with a valve seat, a valvehead cooper- 0l able with the seat, a stem for moving the

